--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/truffle/com.oracle.truffle.api/src/com/oracle/truffle/api/utilities/ConditionProfile.java	Wed Jun 17 10:58:08 2015 +0200
@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package com.oracle.truffle.api.utilities;
+
+import com.oracle.truffle.api.*;
+import com.oracle.truffle.api.nodes.*;
+
+/**
+ * Abstract utility class to speculate on conditions. Condition profiles are intended to be used as
+ * part of if conditions.
+ *
+ * Example usage:
+ *
+ * <pre>
+ * private final ConditionProfile zero = ConditionProfile.createBinaryProfile();
+ *
+ * int value = ...;
+ * if (zero.profile(value == 0)) {
+ *   return 0;
+ * } else {
+ *   return value;
+ * }
+ *
+ * </pre>
+ *
+ * All instances of {@code ConditionProfile} (and subclasses) must be held in {@code final} fields
+ * for compiler optimizations to take effect.
+ *
+ * @see #createCountingProfile()
+ * @see #createBinaryProfile()
+ */
+public abstract class ConditionProfile extends NodeCloneable {
+    ConditionProfile() {
+    }
+
+    public abstract boolean profile(boolean value);
+
+    /**
+     * Returns a {@link ConditionProfile} that speculates on conditions to be never
+     * <code>true</code> or to be never <code>false</code>. Additionally to a binary profile this
+     * method returns a condition profile that also counts the number of times the condition was
+     * true and false. This information is reported to the underlying optimization system using
+     * {@link CompilerDirectives#injectBranchProbability(double, boolean)}. Condition profiles are
+     * intended to be used as part of if conditions.
+     *
+     * @see ConditionProfile
+     * @see #createBinaryProfile()
+     */
+    public static ConditionProfile createCountingProfile() {
+        return new CountingConditionProfile();
+    }
+
+    /**
+     * Returns a {@link ConditionProfile} that speculates on conditions to be never true or to be
+     * never false. Condition profiles are intended to be used as part of if conditions.
+     *
+     * @see ConditionProfile
+     * @see ConditionProfile#createCountingProfile()
+     */
+    public static ConditionProfile createBinaryProfile() {
+        return new BinaryConditionProfile();
+    }
+}